diff options
Diffstat (limited to 'indra/llmath/llquantize.h')
| -rw-r--r-- | indra/llmath/llquantize.h | 128 |
1 files changed, 64 insertions, 64 deletions
diff --git a/indra/llmath/llquantize.h b/indra/llmath/llquantize.h index 10c950abbb..e8d880122e 100644 --- a/indra/llmath/llquantize.h +++ b/indra/llmath/llquantize.h @@ -1,4 +1,4 @@ -/** +/** * @file llquantize.h * @brief useful routines for quantizing floats to various length ints * and back out again @@ -6,21 +6,21 @@ * $LicenseInfo:firstyear=2001&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2010, Linden Research, Inc. - * + * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License only. - * + * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. - * + * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * + * * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ @@ -41,112 +41,112 @@ const F32 OOU8MAX = 1.f/(F32)(U8MAX); LL_ALIGN_16( const F32 F_OOU8MAX_4A[4] ) = { OOU8MAX, OOU8MAX, OOU8MAX, OOU8MAX }; const U8 FIRSTVALIDCHAR = 54; -const U8 MAXSTRINGVAL = U8MAX - FIRSTVALIDCHAR; //we don't allow newline or null +const U8 MAXSTRINGVAL = U8MAX - FIRSTVALIDCHAR; //we don't allow newline or null inline U16 F32_to_U16_ROUND(F32 val, F32 lower, F32 upper) { - val = llclamp(val, lower, upper); - // make sure that the value is positive and normalized to <0, 1> - val -= lower; - val /= (upper - lower); + val = llclamp(val, lower, upper); + // make sure that the value is positive and normalized to <0, 1> + val -= lower; + val /= (upper - lower); - // round the value. Sreturn the U16 - return (U16)(ll_round(val*U16MAX)); + // round the value. Sreturn the U16 + return (U16)(ll_round(val*U16MAX)); } inline U16 F32_to_U16(F32 val, F32 lower, F32 upper) { - val = llclamp(val, lower, upper); - // make sure that the value is positive and normalized to <0, 1> - val -= lower; - val /= (upper - lower); + val = llclamp(val, lower, upper); + // make sure that the value is positive and normalized to <0, 1> + val -= lower; + val /= (upper - lower); - // return the U16 - return (U16)(llfloor(val*U16MAX)); + // return the U16 + return (U16)(llfloor(val*U16MAX)); } inline F32 U16_to_F32(U16 ival, F32 lower, F32 upper) { - F32 val = ival*OOU16MAX; - F32 delta = (upper - lower); - val *= delta; - val += lower; + F32 val = ival*OOU16MAX; + F32 delta = (upper - lower); + val *= delta; + val += lower; - F32 max_error = delta*OOU16MAX; + F32 max_error = delta*OOU16MAX; - // make sure that zero's come through as zero - if (fabsf(val) < max_error) - val = 0.f; + // make sure that zero's come through as zero + if (fabsf(val) < max_error) + val = 0.f; - return val; + return val; } inline U8 F32_to_U8_ROUND(F32 val, F32 lower, F32 upper) { - val = llclamp(val, lower, upper); - // make sure that the value is positive and normalized to <0, 1> - val -= lower; - val /= (upper - lower); + val = llclamp(val, lower, upper); + // make sure that the value is positive and normalized to <0, 1> + val -= lower; + val /= (upper - lower); - // return the rounded U8 - return (U8)(ll_round(val*U8MAX)); + // return the rounded U8 + return (U8)(ll_round(val*U8MAX)); } inline U8 F32_to_U8(F32 val, F32 lower, F32 upper) { - val = llclamp(val, lower, upper); - // make sure that the value is positive and normalized to <0, 1> - val -= lower; - val /= (upper - lower); + val = llclamp(val, lower, upper); + // make sure that the value is positive and normalized to <0, 1> + val -= lower; + val /= (upper - lower); - // return the U8 - return (U8)(llfloor(val*U8MAX)); + // return the U8 + return (U8)(llfloor(val*U8MAX)); } inline F32 U8_to_F32(U8 ival, F32 lower, F32 upper) { - F32 val = ival*OOU8MAX; - F32 delta = (upper - lower); - val *= delta; - val += lower; + F32 val = ival*OOU8MAX; + F32 delta = (upper - lower); + val *= delta; + val += lower; - F32 max_error = delta*OOU8MAX; + F32 max_error = delta*OOU8MAX; - // make sure that zero's come through as zero - if (fabsf(val) < max_error) - val = 0.f; + // make sure that zero's come through as zero + if (fabsf(val) < max_error) + val = 0.f; - return val; + return val; } inline U8 F32_TO_STRING(F32 val, F32 lower, F32 upper) { - val = llclamp(val, lower, upper); //[lower, upper] - // make sure that the value is positive and normalized to <0, 1> - val -= lower; //[0, upper-lower] - val /= (upper - lower); //[0,1] - val = val * MAXSTRINGVAL; //[0, MAXSTRINGVAL] - val = floor(val + 0.5f); //[0, MAXSTRINGVAL] - - U8 stringVal = (U8)(val) + FIRSTVALIDCHAR; //[FIRSTVALIDCHAR, MAXSTRINGVAL + FIRSTVALIDCHAR] - return stringVal; + val = llclamp(val, lower, upper); //[lower, upper] + // make sure that the value is positive and normalized to <0, 1> + val -= lower; //[0, upper-lower] + val /= (upper - lower); //[0,1] + val = val * MAXSTRINGVAL; //[0, MAXSTRINGVAL] + val = floor(val + 0.5f); //[0, MAXSTRINGVAL] + + U8 stringVal = (U8)(val) + FIRSTVALIDCHAR; //[FIRSTVALIDCHAR, MAXSTRINGVAL + FIRSTVALIDCHAR] + return stringVal; } inline F32 STRING_TO_F32(U8 ival, F32 lower, F32 upper) { - // remove empty space left for NULL, newline, etc. - ival -= FIRSTVALIDCHAR; //[0, MAXSTRINGVAL] + // remove empty space left for NULL, newline, etc. + ival -= FIRSTVALIDCHAR; //[0, MAXSTRINGVAL] - F32 val = (F32)ival * (1.f / (F32)MAXSTRINGVAL); //[0, 1] - F32 delta = (upper - lower); - val *= delta; //[0, upper - lower] - val += lower; //[lower, upper] + F32 val = (F32)ival * (1.f / (F32)MAXSTRINGVAL); //[0, 1] + F32 delta = (upper - lower); + val *= delta; //[0, upper - lower] + val += lower; //[lower, upper] - return val; + return val; } #endif |